<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialoClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary"  @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
    <!-- 角色列表 -->
    <el-table :data="roleList" border stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template v-slot="scope">
          <el-row
            class="vcenter"
            :class="['bdbottom', i1 === 0 ? 'bdtop' : '']"
            v-for="(item1, i1) in scope.row.children"
            :key="item1.id"
          >
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{
                item1.authName
              }}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <!-- 通过for循环渲染二级菜单 -->
              <el-row
                class="vcenter"
                :class="[i2 === 0 ? '' : 'bdtop']"
                v-for="(item2, i2) in item1.children"
                :key="item2.id"
              >
                <el-col :span="6">
                  <el-tag
                    closable
                    @close="removeRightById(scope.row, item2.id)"
                    type="success"
                    >{{ item2.authName }}</el-tag
                  >
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 通过for循环渲染三级菜单  -->
                <el-col :span="18">
                  <el-tag
                    closable
                    @close="removeRightById(scope.row, item3.id)"
                    type="warning"
                    :key="item3.id"
                    v-for="item3 in item2.children"
                  >
                    {{ item3.authName }}</el-tag
                  >
                </el-col>
              </el-row>
            </el-col>
          </el-row>

          <!-- <pre>{{ scope.row }}</pre> -->
        </template>
      </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button type="primary" size="mini" icon="el-icon-search"
            >编辑</el-button
          >
          <el-button type="danger" size="mini" icon="el-icon-delete"
            >删除</el-button
          >
          <el-button
            type="warning"
            size="mini"
            icon="el-icon-setting"
            @click="showSetRightDialog(scope.row)"
            >分配权限</el-button
          >
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      roleList: [],
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },

      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的id
      roleId:''
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleList = res.data;
      // console.log(this.roleList);
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmRes = await this.$confirm(
        "此操作将永久删除该文件，是否继续？",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmRes !== "confirm") {
        return this.$message.info("取消了删除！");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }
      this.rightList = res.data;
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 递归获取所有三级权限的id并保存到数组
    getLeafKeys(node, arr) {
      // 若是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      // 若不是三级节点，则递归
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr);
      });
    },
    setRightDialoClosed() {
      this.defKeys = [];
    },
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',');
      const { data:res } = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功')
      this.getRoleList();
      this.setRightDialogVisible = false
    }

  },
};
</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>